温度对于鱼类来说是最重要的外界环境因素,它直接影响鱼类食物的获得,消化酶的活性,食物的转化效率等(Russell,1996;Sun,2001;Ruyet,2004)。在温度对鱼类摄食及生长的影响众多研究中,最适生长温度对于鱼类行为、生理变化、生长发育等方面有重要意义。同一种类不同个体之间或不同时期生理上的最适生长温度的变化都将导致群体分离和行为差异(Brett,1971)。在实际的养殖工作中,准确地确定鱼类生长的最适温度可以节省时间和经费,并提高单位产量(Jobling,1997)。 Temperature is the most important external environmental factor for fish, which directly affects fish food availability, digestive enzyme activity, food conversion efficiency (Russell, 1996; Sun, 2001; Ruyet, 2004). In many studies on the effects of temperature on fish feeding and growth, the optimum growth temperature is of great significance for fish behavior, physiological changes, growth and development. Changes in physiologically optimal growth temperature between different individuals of the same species or at different times will result in population segregation and behavioral differences (Brett, 1971). In practical farming practices, accurately determining the optimum temperature for fish growth saves time and money and increases unit yields (Jobling, 1997).